/* 先删除默认的内外边距 */
* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  font-size: 62.5%;
  /* 设置过根节点的文字大小后，所有子节点的文字大小全部相对于根节点计算，html为10px */
}

body,
input,
button,
a,
textarea,
select {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-size: 1.4rem;
  line-height: 1.5;
  color: #333;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

a {
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: none;
}

a:hover {
  filter: alpha(opacity=90);
  opacity: .9;
}

/* 文本对齐 */
.tc {
  text-align: center;
}

.tr {
  text-align: right;
}

.tl {
  text-align: left;
}

/* 主体 */
.content {
  /* color: #fff; */
  background: #021d60;
  width: 100%;
  /* height: 100vh; */
}

.bg {
  background: url('../img/pageBg.png') no-repeat center center;
  background-size: cover;
}

.module-box {
  display: flex;
  justify-content: space-between;
  /*两端对齐*/
  margin: 5px;
}